Allocated but unannounced space
Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.
“Unannounced” does not mean “unused”
Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.
It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.
Browse by registry
Browse by country
Countries with unannounced space registered through ARIN, largest first.
Unannounced blocks in Canada
3,775 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 65.39.206.0/23 | 512 | ARIN |  CA | 21st Jun 2002 |
| 65.61.58.0/24 | 256 | ARIN | CA | 30th Aug 2018 |
| 66.111.32.0/20 | 4.1k | ARIN | CA | 26th Sept 2018 |
| 66.118.32.0/22 | 1k | ARIN | CA | 4th Oct 2021 |
| 66.132.135.0/24 | 256 | ARIN | CA | 8th Aug 2003 |
| 66.132.142.0/23 | 512 | ARIN | CA | 1st Aug 2025 |
| 66.132.146.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.132.149.0/24 | 256 | ARIN | CA | 8th Aug 2003 |
| 66.132.150.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.132.154.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.132.156.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.132.173.0/24 | 256 | ARIN | CA | 8th Aug 2003 |
| 66.132.174.0/24 | 256 | ARIN | CA | 8th Aug 2003 |
| 66.132.184.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.132.192.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.132.196.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.132.210.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.132.234.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.132.236.0/24 | 256 | ARIN | CA | 8th Aug 2003 |
| 66.132.238.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.132.252.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.180.68.0/22 | 1k | ARIN | CA | 19th Dec 2016 |
| 66.187.14.0/24 | 256 | ARIN | CA | 26th Dec 2024 |
| 66.208.84.0/22 | 1k | ARIN | CA | 1st Jul 2026 |
| 66.223.48.0/24 | 256 | ARIN | CA | 25th Jan 2002 |
| 66.234.10.0/23 | 512 | ARIN | CA | 20th Feb 2002 |
| 66.234.12.0/23 | 512 | ARIN | CA | 20th Feb 2002 |
| 66.33.7.0/24 | 256 | ARIN | CA | 13th Oct 2000 |
| 66.36.128.0/19 | 8.2k | ARIN | CA | 22nd Aug 2002 |
| 66.40.192.0/18 | 16.4k | ARIN | CA | 31st Oct 2000 |
| 66.40.64.0/19 | 8.2k | ARIN | CA | 31st Oct 2000 |
| 66.40.96.0/21 | 2k | ARIN | CA | 31st Oct 2000 |
| 66.59.128.0/18 | 16.4k | ARIN | CA | 5th Jan 2001 |
| 66.6.60.0/22 | 1k | ARIN | CA | 21st Dec 2023 |
| 67.21.193.0/24 | 256 | ARIN | CA | 6th Feb 2009 |
| 67.221.251.0/24 | 256 | ARIN | CA | 26th Feb 2025 |
| 67.226.188.0/23 | 512 | ARIN | CA | 19th Dec 2007 |
| 67.226.224.0/19 | 8.2k | ARIN | CA | 4th Jun 2009 |
| 68.169.92.0/23 | 512 | ARIN | CA | 26th May 2026 |
| 68.170.12.0/22 | 1k | ARIN | CA | 10th Jul 2023 |
| 69.0.160.0/23 | 512 | ARIN | CA | 23rd Sept 2002 |
| 69.0.162.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.0.197.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.0.203.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.0.209.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.0.210.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.0.215.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.12.106.0/23 | 512 | ARIN | CA | 22nd Feb 2019 |
| 69.160.161.0/24 | 256 | ARIN | CA | 3rd Aug 2020 |
| 69.28.216.0/23 | 512 | ARIN | CA | 10th Mar 2003 |